Malicious PDF — malware analysis report

Static analysis result for SHA-256 008cb8936587b529…

MALICIOUS

PDF

52.7 KB Created: 2020-08-22 04:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4d2f6c8a1b0125bb1e2c254017ce43c3 SHA-1: 3ae083c8264b3ce1d7bd7504f93f2d9419f76161 SHA-256: 008cb8936587b5292719bf47a7c1c36aa449ad730c658942963955df3675b3c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to obscure the final destination of the malicious payload. The document body and embedded links suggest a lure related to a game, attempting to trick users into clicking the malicious URL. The ML classifier strongly indicates maliciousness, and the presence of a link farm further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.cc/pify?keyword=bastard+bonds+game
    • http://boribudod.bellaswyoming.com/uploads/1/3/2/6/132681579/4684309.pdf
    • http://desuvolu.carolinaspecialtyproducts.com/uploads/1/3/2/8/132815028/marilevezifar-gogego-wavuwiwiwe.pdf
    • http://files.barbechamblissauthor.com/uploads/1/3/2/7/132712206/5097007.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/8786/3715/files/mekavuzemodobe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2186/8960/files/42464840289.pdf
    • https://cdn.shopify.com/s/files/1/0437/4750/8385/files/game_cabal_online_2_indonesia.pdf
    • https://cdn.shopify.com/s/files/1/0431/5417/8216/files/16265322720.pdf
    • https://cdn.shopify.com/s/files/1/0437/4953/9989/files/33853361040.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lapifobojupe.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/xuwawasujemurapanafudes.pdf
    • https://cdn.shopify.com/s/files/1/0434/4751/7349/files/aptitude_test_for_government_jobs.pdf
    • https://cdn.shopify.com/s/files/1/0427/4959/1718/files/fipolemo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/3251284043.pdf
    • https://cdn.shopify.com/s/files/1/0434/6734/1981/files/baduzowalew.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007135.bin
723854759556c1aeb9f72ef0893eb710ca7d6411eb46db17adc17b213159aa28		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7135 9524 bytes
font_01_sfnt_off00009064.bin
53348c31b8e9d280566b06dc9d9f697ab119da1e3faed9048112436750bc0cf2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9064 5300 bytes
font_02_sfnt_off0000a24b.bin
baad06ed78d39cb84c37f97a104d86d8f055129641f226a388cdaa50775348c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA24B 10508 bytes

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